wuchong commented on a change in pull request #11804:
URL: https://github.com/apache/flink/pull/11804#discussion_r411846216
##########
File path: docs/dev/table/catalogs.md
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@@ -37,6 +41,76 @@ Or permanent metadata, like that in a Hive Metastore.
Catalogs provide a unified
The `GenericInMemoryCatalog` is an in-memory implementation of a catalog. All
objects will be available only for the lifetime of the session.
+### JDBCCatalog
+
+The `JDBCCatalog` enables users to connect Flink to relational databases over
JDBC protocol.
+
+#### PostgresCatalog
+
+`PostgresCatalog` is the only implementation of JDBC Catalog at the moment.
+
+To set a `JDBCcatalog`,
Review comment:
```suggestion
To set a `JDBCCatalog`,
```
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